Even a mild brain injury can have a huge impact on a person's life. Following an accident, medical staff often focus on the injuries they can see and sometimes brain injuries are missed.

Carol Stiles speaks to a neuropsychologist about the symptoms of brain injuries, how head injuries are diagnosed and the path to recovery. She also meets an extreme athlete who has had to re-assess haw far he will push himself following a severe traumatic brain injury.

Pictured: Stefan Hadfield improving the environment at a Hamilton park.